Buggy code:
public class FirstTasksSetTest { public FirstTasksSetTest ( ) { } @ Test public void testOne ( ) { } @ Test public void testSame ( ) { } @ Test public void testSame2 ( ) { } @ Test public void testFive ( ) { } @ Test public void testIncermentor ( ) { } @ Test public void testIncermentor2 ( ) { } @ Test public void testIncermentor3 ( ) { } @ Test public void testSignumZero ( ) { } @ Test public void testSignum ( ) { } @ Test public void testSignumNegative ( ) { } @ Test public void testContentSquare2 ( ) { } @ Test public void testContentSquare3 ( ) { } @ Test public void testContentSquare ( ) { } @ Test public void testNearestHigherOrSameEven ( ) { } @ Test public void testNearestHigherOrSameEven2 ( ) { } @ Test public void testNearestHigherOrSameEven3 ( ) { } @ Test public void testMax ( ) { } @ Test public void testMax2 ( ) { } @ Test public void testMax3 ( ) { } @ Test public void testMax4 ( ) { } @ Test public void testMax5 ( ) { } @ Test public void testMax6 ( ) { } @ Test public void testmin ( ) { } @ Test public void testmin2 ( ) { } @ Test public void testmin3 ( ) { } @ Test public void testmin4 ( ) { } @ Test public void testmin5 ( ) { } @ Test public void testmin6 ( ) { } @ Test public void testmin7 ( ) { } @ Test public void testmin8 ( ) { } @ Test public void testmiddle ( ) { } @ Test public void testmiddle2 ( ) { } @ Test public void testmiddle3 ( ) { } @ Test public void testmiddle4 ( ) { } @ Test public void testmiddle5 ( ) { } @ Test public void testmiddle6 ( ) { } @ Test public void testmiddle7 ( ) { } @ Test public void testmiddle8 ( ) { } @ Test public void testmiddle9 ( ) { System . out . println ( "middle" ) ; int a = 700 ; int b = - 1000 ; int c = - 1000 ; <START_BUG> int expResult = 700 ; <END_BUG> int result = FirstTasksSet . middle ( a , b , c ) ; assertEquals ( expResult , result ) ; } @ Test public void testAlwaysFalse ( ) { } @ Test public void testIsPositive ( ) { } @ Test public void testIsPositive2 ( ) { } @ Test public void testIsPositive3 ( ) { } @ Test public void testIsBothPositive ( ) { } @ Test public void testIsBothPositive2 ( ) { } @ Test public void testIsBothPositive3 ( ) { } @ Test public void testIsBothPositive4 ( ) { } @ Test public void testAtLeastOneNegative2 ( ) { } @ Test public void testAtLeastOneNegative3 ( ) { } @ Test public void testAtLeastOneNegative4 ( ) { } @ Test public void testAtLeastOneNegative5 ( ) { } @ Test public void testAtLeastOneNegative6 ( ) { } @ Test public void testAtLeastOneNegative7 ( ) { } @ Test public void testAtLeastOneNegative8 ( ) { } @ Test public void testMinOrMax ( ) { } @ Test public void testMinOrMax2 ( ) { } @ Test public void testMinOrMax3 ( ) { } @ Test public void testMinOrMax4 ( ) { } @ Test public void testMinOrMax5 ( ) { } @ Test public void testMinOrMax6 ( ) { } @ Test public void testSumOfAlll ( ) { } @ Test public void testSumOfAlll2 ( ) { } @ Test public void testSumOfAlll3 ( ) { } @ Test public void testSumOfAlll4 ( ) { } @ Test public void testSumOfAlll5 ( ) { } @ Test public void testSumOfAllPOsitive ( ) { } @ Test public void testSumOfAllPOsitive2 ( ) { } @ Test public void testSumOfAllPOsitive3 ( ) { } @ Test public void testSumOfAllPOsitiv4 ( ) { } @ Test public void testSumOfAllPOsitive5 ( ) { } @ Test public void testSomePositive ( ) { } @ Test public void testSomePositive2 ( ) { } @ Test public void testSomePositive3 ( ) { } @ Test public void testSomePositive4 ( ) { } @ Test public void testSomePositive5 ( ) { } @ Test public void testallPositive ( ) { } @ Test public void testallPositive2 ( ) { } @ Test public void testallPositive3 ( ) { } @ Test public void testallPositive4 ( ) { } @ Test public void testallPositive5 ( ) { } }

Fix:
int expResult = - 1000 ;